Abstract
Motors of electric automobile with low noise characteristics are increasingly in demand due to environmental considerations. The primary source of noise is attributed to electromagnetic noise, mainly affected by electromagnetic radial force. To obtain a better understanding of origination and components of radial force, in this paper, theoretically, calculate and analyze electromagnetic radial force principles; and establish 2-dimension CAE model of PMSM subsequently. After simulation and data analysis, in terms of time and frequency domain, respectively, calculate the numerical radial air-gap flux and radial force. Compare the theory with numerical results. To some extent, ratify the radial force theory of PMSM in electric vehicles.
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